Top cover of a coffee maker



FIG. 1 is a perspective view as seen from the top, front, and right side of a top cover of a coffee maker showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines in FIGS. 1, 4, 5 and 6 showing the seam which separates the pivotal water reservoir cover from the housing cover; and the broken lines in FIG. 1 showing the housing of the coffee maker beneath the top cover are used for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a top cover of a coffee maker, as shown and described. 